Surgical instrument



March 27, 1928.

G. A. JOHNSON SURGICAL INSTRUMENT Filed Feb. '7.I 192'? n/@afar di?.524? :manY

4 Z 6 A? l www, M7 d?? Z/j Patented Mar. 27, 1928.

f GEORGE A. JOHNSON, E roMEEoir,Y Iowa. i

SURGICAL INSTRUMENT.

Application filed February 7, 1927. serial No. 166,488.

The object of my invention is to provide a surgical instrumentespecially adapted for removing tumors Vand being of simple, durable andcomparatively inexpensive construc- 6 tion. i

A further object of my invention is to provide such an instrument withmeans for. receiving an object and means for severing and 'withdrawingit.V j

Still a further object. is to provide such an instrument especiallyadaptedffor the removal of tumors from the milk ducts of the teats of ananimal.-

Still a further object is to provide a convenient means foroperating thedevice for cutting the tumor-from the inside wall of the milk duct andthen withdrawing it. More particularly itis my object to provide asurgical instrument of this character. in the form of a tube tolbeinserted inthe milk duct anda shaft having a pocket and,V beingrotatably mounted within the tube, there being cutting coacting edges onthe tube and the shaft adjacent the pocket whereby the tumor 'ri-.ay becut.

Still a furtherobject vis to providev the parts of such an instrument'arranged to be easily assembled and disassembled for cleaning purposes,said arrangement also providing for a diagonal Vstroke of one of thesevering edges relative to the other for vmore y effectively cutting thetumor.

With these and other objects in view, my invention consists in theconstruction, arrangement and combination of the various parts of mysurgical instrument, whereby thee objects contemplated are attained, ashereinafter more fully set forth, pointed out in my claims andillustrated inthe accompanying drawings, in which: j Figure l is aperspective view of my iin-A proved operating instrument.

Figure 2 is a vertical sectional view of the Y same. f y

Figure 3 is a side elevation of the device, showing it inserted in themilk duct of the I teat of an animaland inposition to receive the tumorgrowth `within the duct. Y l Y Figure 4, is an enlarged cross sectionalview taken on the line`4`4 of Figure illustrating the tumorgrowthreceived in the instrument preparatory to cutting it vloose fromthe insidepwall of the milk duct.`

igure 5 isa similar sectional view showing the tumor being Cut loosefrom the wall ofk the duct, and

Figure 6 illustrates the tumor cut loose i and received within thepocket of they operating instrument preparatory to removing theinstrument from the duct.

On the accompanying used the referencel numeral 10 to indicate thetubular ,casingof my i ing instrument. The casing l0 isV pointed androunded at itsrupperiend as'V indicated at V12. The lower' Yend`of thecasing 10 is enlarged as indicated at Hand internally `screwthreaded.

Extending fromv the enlarged portion '14 of the casing 10 is an arm in afinger engaging loop 18.

Rotatably received withinthe casing l0 is ashaft 20 having a'nenlargedscrew threaded portion 22 at kits lower end. The enlarged portion 22extends downwardly and then outwardly in theV form of an ai'm 24 whichterminates in aiingerengaging l loop 26.

Fi'oin'the construction ofthe parts thus far described, it will bereadily seen ,that the shaft 20 canbe assembled within ythe .casing 10by rotation thereof, the threads on the enlargedportion 22 coactingwiththe internally screw threaded portion 14 of Vthe casing 10.V i' 'YAdjacent the of the casing 10 16 terminating pbinteuand rounded end i2 Iprovide a notch 28 which j drawings I have 1 improved operatis elongated'longitudinally of the casing l0.

The Ymanner of cutting the notch 28 provides a sharpened edge 30terminating at the insidewall of the casing 10.' v This constructionisbest the drawings. Y

Adjacent the upper end oftheshaft ,20 I providea pocket 32 havingterminating at the outside ofthe shaft 20 whereby a sharpened edge Y321Cjis formed. From disclosed Figure 4 of an open sidel the construction ofthe parts just'KV the pocket described, it will be seen that thecoacting sharpened edges 30 and 34 form a shear when the shaft 20 isrotated relative to the casing 10 to a predetermined position.

Practical operation.

of anyallml suc A teat 38 is illus- It may be herefmenf..

.of the instrument '.is.v

h sides using my'y device inserted in the ducten() and pushed upwardlyuntil the notch;28freg1sters with the tumor l 42. The 4operator fthen;manipulates the teat 38,, squeezing it adjacent thetumor. 42... and

forcingthe tumor. into/the poclretfBQt` This f operation can easily beoperator.'` .canpfeel with his lfingers when Athe tumor, has ,enteredthe .pocketf 32.

The operation -of `forcing drawings, the. .arrowy 43. indicating Ythe,die

performed: as -r,the

the, tumor, into v is illustrated in Figure a4 ofv lthe rection ofpushingthe surfaceof 4theteat to forcee the tumor e into fthe pocketsThefshaft 2() is then rotatedinfthe direcn tion -indicated by-.v-,thearrow 4h the! `finger still being held .against fthe the tumor fromcomingoutiofthe .pocket 32. As the shaft 2O is rotatednthesharpfgitudinal movement is imparted to the shaft 2() relative to the casing10 when the shaft is rotated within the casing. This imparts a diagonalmovement of the sharpened edge Set relative to the sharpened edge 30which is desirable in severing the tumor from the wall of the duct.

It will,A lof course, be understood that befor\the removal of tumorsfrom the teats of animals, it can also A vbe used yfor removing othergrowths within i' duets-ofany-character where it is possible toforcenthegrowth into the pocket 32 so that it'iin'ay'be severed from theinside wall of thevduct... Considerable modifications in the structural;details of. the. levice or. ,the substitution of.mechanical.,equivalentscould be employed for. accomplishing the same result vand fit, kis. myintention :to vcover by.4 my claims any y forms of such deviations ofsuch construe-v` tion which might reasonably; beincluded within` theirscopel I claim. as my invention; f 1. An instrument for shearing .and`receiv-4 ing objects comprisinga tube, ashaftf therein,`` a notch cutlin. said `tube,the bottom. of. said notch Q extending ,less than half Ywayv through the tube whereby cuttingedges having annacute angle areIformed, a pocket in said shaft .adjacentsaid notchywhereby Ymovement ofsaid shaft relative to said tube' iteat to prevent.

the sharpened fedge YY30 of fthe ,notch; 28 una` til in the position as.illustratedgiuFigure 5 only thzport-ion Of-,the tumor con-nectingit tothe insidet ywallof f theg milk fduct is between the:.sharpenedqedges30; wand 34.1

It; isv obvious thatgfurther yrotation ofthe shaft 20vinthe.direction;ofV thetarrow. 44;4

from the wallfof the- 1 duct and the tumor itself will be received will:`Esever i the tumor within the pocket 32. A. It mayherefbe mentionedthat rotationof ithe shaft 20=is accomplished'.by-movingthe loop 26:toward the. loop. 18 into 'the loops.=.

Figure 6 of the drawings illustrates the shaft 20 rotated has.v passedtheshar-pened,edgel 30l which closesy the opening formedfbynthe notcht28in Lthecasi11g.f10 and.

in which position the f by inserting a .finger and ithumbr until thesharpenededge 34.

tumor 4:2. is. complet` lv severed-from .the wall i oft theaduct .40.andreceived within the pocket 32.@` The operating linstrument .may

no w be ...withdrawn .from the milk? duct l0 and the tumor dischargedfrom ...thea-pocket# and'. the. ,notch 28.

, inggobjects lcomprising a tube,

. notch r extending v,using a fthreaded f connection. between ,Y

the casingflO and the slaaf-715201.21 slightly' lon-.-V

thefsides offsaid Vpocket beinggtangentialgto the circumference of'saidshaftat thev edges of said pocket whereby cutting VedgesY areformed.

3. A devicehvofthefclass` described. comprisingy a v,tubular casing, 4aleverl Athereon, a notch in said casinghaving sharpened-'edge's, a shaftin lsaid ',casin'gand in screw .threaded y.

engagement therewith,l a lever .on-said shaft'.

movement of one ofjsaidlevers relative to the other oneimparting-rotation'and longitudinal movement of the shaft relative tothe casing, a pocket in said shaftliavingsliarp ened edges whereby adiagonal shearing `action occurs `between the ,edges of saidlnotcninsaid casing and-the edges of 'said .pocket when the levers aremoved..Y

4. An instrumentv for shearing ,and receiv-A A a shaft. there a notch insaid tubethe.bottom of said =less than :half way through the tubewhereby acute angle cutting edges A are .formed-,a .pocketinsaid shaft,.the sides of saidpocketvbeing]tangential to =.the cir cumferenceofg'saidv shaftlatthe edges of n' said pocket whereby.Y cutting. edge/S4 are formedwhereby. rotation `of, said shaft',rela3- tive to said tubecauses a shearing action besaid tube and said shaft, handle means ontween the edges of Said notch and the edges said tube and said shaft forrotating one of said pocket. relative to the other' whereby 5. In aninstrument of the character deshearing action between said shear edgesoc- 5 scribed, a tube, a shaft therein, eoacting curs upon suchrotation.

shear edges formed on said tube andV said Des Moines, Iowa, January 24,1927. shaft, ascrew threaded connection between Y vGEORGE A. JOHNSON.

a. diagonal 10

